The new Oz card is incredible...it's not a national ID card, it's just a card storing data and biometrics to reduce the instance of fraud against the social welfare system, by ensureing that you are exactly who you say you are, and that thet person is real.

It's in no way compulsory, like a real national ID card would be. The only people who must have it are those using the health system, and those seeking access to welfare services.